Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 430
eld being thereby reduced, the machine absorbs less motivepower, and when the lamps are turned on again the operation isreversed, and thus the power required to drive the generator isproportioned to the work it is required to do. THE BRUSH ARC LAMP. 409 The carbon pencils consumed under the Brush… … Fig. 250. carbon are consumed. When, however, the lamps are requiredto burn for a longer period, double carbon lamps are employed,fitted with two pairs of carbon holders, as shown in fig. 242, andeach is controlled in the same way as in the single carbon lamp, 410 THE ELECTRIC LIGHT. but the…
Electrical engineering
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